Sounds like he might be having trouble "switching off" his thoughts allowing him to sleep... in this case listening to a talking book might help... I know that I sometimes have trouble switching off as well and "need" the beside radio turned on... to Radio National's News radio. At that time of night someone is usually droning on about the conflict in the Middle East... very soporific ;) (not to down play the seriousness of the conflict in that part of the world).

